Fluid ejector



Patented Jan. 16 1923.

: UNITED. sraresf i,442,'j29sf1 PArEN oF Fiel-3 rcanarias T. sAiviUELsou, Aor niiw vonnnniis, LOUISIANA.

rLui-i) unieron.

Application filed Februaryj, 1921.." "SerialpNo 443,040.

' To f/,ZZ whom t muy concern.' v

Be it known that `I, CHARLES vT. SAMUEL-- soN, u. subject of thev King of Sweden, re-

` .siding .at New Orlea.ns,-inl the parish of Cfi Orleans anc State of Louisiana, U. S. A., have invented new and useful improvements f in Fluid Ejectors, is a specification. i This invention relates to ejeetoislorY comol which the lollowing` pressing lluid, such as'air,v gas, vapor, or,

a mixture otV any of them, of the type in which a-.motivelluich such as steamunder pressure, is allowed to entrain the fluid to be compressed.

More particularly, the inventionrelates to an ector of the multi-stagetype in which the resultant of the first stage, viz, the mixed coinpressible fluid and motive fluid is further compressed kby being entrained by. a second jet ofymotive-iiuid j The object' of the invention is the provision oia a deviceof this general type'havan improved, simpliiecland' more 'ef-' tective arrangement of. motive 'fluid distribution chamberswhereby a. much largerl niotive fluid surface can be obtained than in devices heretofore known .with substantially the 'saine amount of motive fluid as is used in other eject-ors...

yThe invention is chamber extends through the mixing c iam-v ber so as to entrain the resultant or" 'the' niet stage operation, namely, the mixed compressible fluid and motive fluid. l

The nozzle structures used inassociation with the distribution ,chambersV may all be of .the same general type, and preferably are each in the form of an annular member hav inga plurality 'of circumferentially spaced independent motive lfluid passages ext-endlup, j'

therethrough, cai-h passage gradually. in-

creasing); in Width circumferentially oitlie further characterized by an improved nozzle structure fi'vhich alsofv i assists in the obtainance of a large motive fluid surface with the use oifa comparatively member, so that theseveral motive fluid jets l gradually converge in their passage through' the nozzle member andA after emergingtroml the member may unite to form a single annular kmotive fluid beam.l

.ln theaccompanying,` drawings' there is shown one form of a device in which the iii-1. vention may beembodied, and in these drawf ings 1- Fig; 1 is la top plan View ofthe ejector,

a portion 'of the ejector being shown in hori-y zontal cross section,V

Fig-- 2 isa vertical cross section ony the. line 2 2 off'kFig. 1, andv j f I Figsihe and 5 are-viewVV showingvthe" nozzle structuresfor the distribution charn- 1 y berszl, 18 and 1'7.respectively.

Referring to the, dreiwingsl more in ldetail, reterence. will befhad, first, to the lgeneral construction o' the ejector body which, in

the illustrated embodimentof the invention, comprises a lower casing section l10 Which istrusto-c'onical in shape,;and isl providedy with Vatop llangeJll through which pass. bolts/12;servingtosecurethe uppercasing.-v .sec-tion 13 fto the; lower casing` section, the;

bolts .passing4 through e. ange 14 upon-the upper. casing` section. f i

rllhe casing section 13 may be formed with.;

a top ,flange 15 f' which extends inwardly from the peripheral wall of Athe section.I

toplrtlange 15 are three 1 annular concentric chambers 16, 17 andl '18 having openbottonic andxsupjiio-rted from the casing'wallby webs 1ST. A. laterallyextending inlet19 may be provided for admitting motive-fluid to.y

cach of 4`the chambers. They distribution chamber lt'is termed by: a depending) annu- 'lar wall 20 Which'alfordsa central Opening 21 through .the top-casingsection, aud is.v provided at its lower end with threading.

cooperating with aring 23,., which isfheld upon the wall 2O by' `means-of,threading upon the inner periphery of the ring'. The

Lc'icated withinthecasing 13 and below the s bottom face of. the ring 23 hasitormed .there-' on webs'QA. which serve to support; an inverted bowl shaped centerpiece 25 extendingY downwardly into the lower casing section 10. .The outer peripheral surface of "tliefringgv 223 'is inclined outwardly lsimilarliy'to the inner surfacefoi:-.thev outer wall 1,6 ot'- the chamber 16.'.Between thewin'gQB andthel wall'1G` is supported the nozzle member 93 showiiiii Fig. 3,iwhich is 'placed against the wall 161 of the chamber beforel the rino' 23 and the centerpiece 25 yare placed in position; the member 23 together 'with ring 23 and wall 16 forming the nozzle structiire. The chamber l8, like the central chamber 16, is also termed with an open bottom, and the outer wall19 is threaded upon its inner face to receive the nozzle supporting ring 26, the inclined inner peripheral face of which cooperates with the inclined face of the inner chamber wall 27 to support the nozzle member 28shown in Fig. el. This nozzle meni- -ber, which with the ring 26 and wall 2T, forms the nozzle structure tor chamber 18, is placed against the inner wall ot the chamber and the ring subsequently secured into position to hold the nozzle structure against the wall 2T. The chambers 16 and 18 serve as reservoirs for motive fluid lor the first stage operation, and the distribution chainber 17, located between and concentric with these distribution chambers, is intended to distribute the motive fluidy for the second stage operation. The chamber 1? is also formed with an open bott-om, in which are threaded the nozzle supporting rings 29, 30 which are threaded to the walls of' the chamber in the manner indicated in Figs. 1 and 2. Between theserings may be supported the nozzle member 31 shown in Fig. 5, the nozzle member being clamped between the two rings supported from the chamber walls to form withsaid rings a nozzle structure for the chamber 17. lt will be noted that t-he nozzle structure 3l extends through the central portion of an annular chamber 32, which may be termed the-mixing chamber. The mixing chamber 32 is formed between the peripheral wall 10 ot the lower casing section and the centerpiece 25. The distribution chambers 16 and 18 discharge the motive liuid into the mixing chamberthrough their nozzle structures, which at the same time draws thereinto the compressible fluid which passes through inlets 33 between the chambers 16 and 1T, inletsl 34 between the chambers 1T and 18, .inlets 35 aroundr the chamber 18. and the central openingl Referring to the construction ol the nozzle members, Figures 3, el and 5 show nozzle elements which are adapted to fit between the several nozzle rings and the walls ot the distribution chambers as indicated in Figure 2, but itshould be understood that instead oi" employing separate nozzle structure as is shown, the necessary passages might readilyT be cut in the faceof the nozzle supporting rings 23, 26 and 30. However, itis roften desirable to employ separate members for shaping the motive fluid jets, members ot satisfactory and preferable construction being shown in Figures 3. 4 and 5. Referring more particularly to Figure 5, there is shown the nozzle member for the centra-l distribution chamber 17. This nozzle structure comprises an annular member 31 having an inwardly extending flange 3l adapted to fit i over theupper edge of the nozzle ring 29 to be supported thereby. lin its peripheral wall the nozzle member` is cut away at circumferentially spaced points to-form inlet openings 3T which lead to passages 38l gradually in-` creasing in width circumferentially of the nozzle member so as to form jets ot motive fluid which, as they pass through the nozzle member gradually converge, and after emerging from the nozzle member merge 'to form a single annular motive fluid beam.`

In Fig. 3 is shown the nozzle member 23" tor the distribution chamber 16. lt will bc noted that this nozzle member has passages 23 ot the same general shape as the passages 3 8 of the nozzle structure for the central distribution chamber 17. iowever, this nozzle member is or frustoronical shape, the passages being located in a plane paralleli with the plane formed by the circumference oit the cone. l

Figure 4l shows the shape of the nozzle member 28 for the exterior distribution chamber 18. This nozzle member is ot the same general annular shape as the other nozzle member and is J'ormed with an external flange 28 adapted to rest upon the upper face of the nozzle ring` 26. lt is also ot the same truste-conical shape as the structure 23', shown in Fig. 3, and is formed with" similar passages 28 for the motive fluid jets, these passages, however, being located i withiny the flange 28 instead ot' exterior thereto as in the structure shown in Figure 3. v Y

In operating this ejector, motive iiuid is admitted to the three distribution chambers` 16, 17 and 18 by means of the. inlet 19. The motive fluid from the chamber 18 issues from the chamber through the independent inletsiof its nozzle structure in thevt'orm ot independent jets, which Vhave a very hijih velocity. These jets gradually expand. circumterentially ot the nozzle member, 'andr after emerging from `the nozzle member merge into a single annular stream having' these jet portions ot very high velocity.' The annular stream issuing from the nozzle member 28 is ejected across the compressiblc fluid inlets 34 and against the outer tace ot' i the second stage nozzle outlets 38. i/it the same time the motivefluid from the smaller first stage distribution chamber 16 issues in asimilar manner from the nozzle structure against the inner face ofthe second stage nozzle outlets 38 in the form ot' anv annular stream,and across the compressible fluid inlets between thefchambers 16 and 17. will be obvious that the motive fluid'streams from the chambers 16 and 18 converge, the stream from the chamber r16 drawing compressible fluid through the inlets 33 and inlet Itv 21 and mixing therewitl` in `the chamber 32.

the motive fluid from thechamber 18 drawing compressible fluid through inlets 34, 35 and mixing therewith. The motive fluid in the second stage chamber 17 is discharged from the nozzle member 31 in advance of and below the mixing chamber 32 between the side wall of the center piece and the wall of the bottom casing section 10. The

paratus which affords an unusually largemotive fluid surface in each of the stages with but a small consumption of motive fluid, and which causesthe motive fluid to issue from its distribution chambers with a very high velocity. It will, of course, be understood that the detail showing in the drawings and the above detailed description are vset forth merely for the purpose of conveying a thorough understanding of the invention, which is not limited to the illustrated and described embodiment thereof, but which is more clearly defined in the following claims.

lVhat I claim is:

1. In an ejector', a nozzle structure comprising an endless series of nozzles, each` nozzle having a passagefor a motive fluid jet provided with end walls which diverge circumferentally of the series from the inlet to the outlet of the nozzle, andlateral walls between the end walls which are substantially parallel.

2. In an ejector, a nozzle structure com-l prising a plurality of nozzles arranged in a circular series, each nozzle having a motive fluid jet passage provided with end' walls which diverge from the inlet to the outlet of the nozzle circumferentially of the series, and lateral walls between the end walls which are substantially parallel.

3. In an ejector, a nozzle structure com prising an endless truncated-cone shaped nozzle member provided with a plurality of spaced independent passages for motive Huid jets, each passage gradually increasing in width circumferentially of the nozzle' member from its inlet to its outlet, and each' passage being located in a plane parallel with the plane defined by the circumference of the cone.

4t. Multi-stage ejector apparatus comprising a plurality of separated concentric distribution chambers for motive fluid, walls separating said chambers, a nozzle structure comprisinga plurality of individual fluid jet passages,'in association with each of saidv distribution chambers, one of said vdistribution chambersserving to distribute motive fluid for the second stage, an inlet for compressible fluid adjacent the nozzle structure for the first stage distribution chamber, a mixing chamber located in the path of said fluid, the exit opening of the nozzle structure of said second stage chamber being located in advance of said mixing chamber whereby the mixed motive and compressible fluids may be compressed by the motive liuid issuing from said second stage nozzle.

5. Multi-'stage ejector apparatus comprising a plurality of concentric distribution chambers for first-stage motive fluid, a nozzle structure in association with each of said distribution chambers, inlets for elastic fluid adjacent said nozzle structures, a yfirst-stage mixing chamber, a second stage motive fluid distribution chamber concentric `with said first stage chambers, anozzle structure in association with Said second-stage distribution chamber and adapted to dischargevmotive fluid in advance of said mixing chamber to thereby compress the resultant of said first-stage operation. i

6. Multi-stage ejector apparatus comprisinga plurality of distribution chambers for first-stage motive fluid, a nozzle structure in association with each distribution chamber,` elastic fluid inlets adjacent the nozzle structures, said inlets and nozzle structures leading to a mixing chamber, a second-stage motive fluid distribution chamber substantially concentric and in substantiallyy the same horizontal plane with said first mentioned distribution chambers,'a nozzle structure in association with said last-mentioned distribution chamber and extending through saidmixing chamber thereby to discharge. motive fiuid in advance of the resultant of said first stage and to compress said resultant.

i'. Multi-stage ejector apparatus 'comprising a plurality of annular distributionV chambers for first-stage motive fiuid, a nozzle ystructure in association with each distribution chamber, elastic fluid inlets adjacentthe. nozzle structures, said inlets and nozzle structures leading to amixing chamber, an annular second-stage lmotive fluid distribution chamber, a nozzle structurev in association with said last-mentioned distribution chamber and extending throughV said mixing chamber thereby to discharge motive Huid in advance of the resultant of said first v stage and to compress said resultant.

distribution chamber, elastic fluid inlets adjacent the nozzle structures, said inlets and nozzle structures leading to a mixing chamber, an annular second-stage motive fluid distribution chamber concentric with said first stage distribution chambers, a nozzle structure in association with said last-inentioneddistribution chamber and extending,

through said mixing chamber thereby to discharge motive fluid in advance of' the resultant of said first stage and to compress said resultant.

9. Multi-stage ejector apparatus comprising a plurality of concentric distribution chambers for first-stage motive fluid, a nozzle structure in association with each distribution chamber, a mixing chamber, elastic fluid inlets to said mixing chamber, said nozzle structures discharging into said mixing chamber, a distribution chamber for second stage motive fluid located between and concentric with said first-mentioned distribution chambers, a nozzle structure in association with said second stage distribution chamber and extendingthrough said mixing chamber to discharge motive fluid in advance of said mixingchamber.

l0. Multi-stage ejector apparatus comprising a plurality of concentric distribution chambers for first-stage motive fluid, a nozzle structure in association with each distribution chamber, a mixing chamber, elastic fluid inlets to said mixing chamber, said nozzle structures discharging into said mixing chamber, a distribution chamber for second stage motive fluid located between and concentric with said first-mentioned distribution chambers, a nozzle structure in association with said second stage distribution chamber and extending through said mixing chamber to discharge motive fluid in advance of said mixing chamber.

1.1.Multi-st-age ejector apparatus comprising` a plurality of concentric distribution chambers for first-stage motive fluid, concentric nozzle structure in association with said distribution chambers, a mixing chamber, elastic fluid inlets into said mixing chamber, said nozzle structures discharging motive fluid in concentric endless streams into said mixing chamber, the two streams converging', a distribution chamber for second stage motive fluid concentric with and located between said first-stage vdistribution chambers, an endless nozzle said second stage nozzle structure serving to compress the resultant of said first stage operation.

13. In an ejector, a motive fluid distribution chamber having an inlet opening, a mixing chamber lhaving an inlet opening for compressible fluid, said distribution chamber having an outlet opening, and a nozzle structure for delivering motive fluid jets from the distribution chamber to said mixing chamber, said nozzle structure comprising spaced walls adjacent the outlet of said distribution chamber, and means between said walls having a plurality of spaced fingers, the spaces between said fingers affording passages for the motive fluid and the fingers dividing the space between said walls int-o a plurality of independent nozzle passages.

14. In an ejector, a nozzle structure comprising spaced walls, a member supported between said walls having a plurality of separated fingers provided with passages therebetween, the fingers dividing the space between said walls into a plurality of independent nozzle passages, said member being removable from between said walls.

l5. In an ejector, a nozzle structure comprising a pair of concentric walls slightly spaced apart in the same horizontal plane` an annular member supported between said walls having a plurality of fingers spaced circumferentially of said walls, said lingers having passages therebetween which serve as passageways for motive fluid jets.

16. In an ejector, a nozzle structure comprising a pair of concentric walls slightly spaced apart in the same horizontal plane, an annular member supported between said walls having a plurality of fingers spaced circumferentially of said walls, said fingers having passages therebetween which serve` as passageways for motive fluid jets, the sides of the adjacent fingers diverging to provide passages which widen circumferentially of said walls.

In testimony whereof I have hereunto set my hand.

CHARLES T. SAMUELSON. 

